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Cassin's Kingbird

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The Cassin’s is fairly widespread at middle elevations in the southwestern and west-central United States, where it overlaps extensively with the western kingbird. Monotypic. Length 8.4–9.2" (21–23 cm)

Similar Species The western has paler upperparts and chest; much less chin-breast contrast; and darker wings and black tail with white outer web of outer feather pair (but beware westerns completely lacking outer tail feathers or with worn-off outer webs). The Cassin’s has pale (but not pure white) outer web. The thick-billed, tropical, and Couch’s have paler or yellower breasts, uniformly brown tails, and heavier bills; tropical and Couch’s also have paler backs and deeply notched tails.